Quote Originally Posted by Stoo Batchelor View Post
Dan
Please take a look at the link below;
http://www.uos.harvard.edu/ehs/silver_recovery.shtml

Now, as this is an article on silver recovery from darkroom fixers,
and it also warns of the dangers of discharging used fixer in to
the enviroment, I can only assume that there is a silver
content in used fixer.
At what point a fixer reaches a point where as it becomes
a hazard does not concern me. The fact is that used fixer will
have silver particles, or what ever word you wish to use, in it.
As this silver is capable of attaching itself to surfaces, in
this instance it would be the soft emulsion of my film,
I have chosen that during my own development
routine I do not wish to subject my film to
such a risk, however small.

Yes, as this post proves there are many APUGers re-using
fixer with no complaint, and they are very happy with their
results, as I am with mine. So there is no reason for any of
us to change our development routines. Regards Stoo
That article has to do with the specific means by which the
silver may be extracted from a used fixer solution. The means
detailed uses an active metal to reduce the silver thereby
plating the silver out of solution. Electrolytic means are
also used.

Again; off hand I can think of nothing we might have around
the darkroom which would cause the precipitation of metallic
silver from within a fixer solution. Dan